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Panasonic KX-TG5621BXS, Service Manual

The Panasonic KX-TG5621BXS is a feature-packed cordless phone system that boasts crystal-clear sound quality and convenient functions. Unlock the full potential of this device by easily accessing its Service Manual for step-by-step instructions on setup, troubleshooting, and advanced features. Download the manual for free now at manualshive.com.

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CN331

HEADSET_JACK

HANDSET SP

1

4

2

3

5

470nH

L326

470nH

L327

NC

R354

2.2k

R312

2.2k

R314

2.2k

R315

MIC

1

2

SPP

SPM

MICM

MICP

VBAT1

VSS1

VBAT2

VSS2

RX
TX

CHG1

CHG2

NC

L351

NC

L352

NC

C313

NC

C311

NC

C312

NC

C334

NC

C336

NC

C322

NC

C332

K0.018

C315

K0.018

C314

2.2k

R318

2.2k

R334

6.3

22uF

C335

6.3

22uF

C317

Q331

1

3

2

10k

R331

1k

R333

NC

C351

NC

C352

Q361

2

3

1

Q362

1

3

2

47k

R363

47k

R361

1k

R362

3.3k

R366

NC

R367

NC

R368

Q231

1

3

2

NC

R232

K0.1

C231

22k

R231

10k

R234

IC221

3.2V_Reset

4

VSS

3

NC

1

OUT

2

VDD

Q221

1

3

2

D223

12

K0.01

C221

K0.1

C224

K0.1

C222

22k

R222

220k

R223

NC

R224

100k

R228

C211

330uF

4V

Q243

1

3

2

K0.1

C371

NC

L211

NC

R201

K0.01

C305

K0.01

C212

NC

R340

1k

R225

1k

R242

10k

R241

100k

R209

100k

R227

22k

R226

2.2M

R377

270k

R243

10

R208

K0.1

C206

K0.1

C215

K0.1

C241

K0.1

C226

K0.1

C225

K0.1

C306

K0.1

C340

J100P

C242

NC

C354

NC

R205

NC

R206

NC

R207

IC241

EEPROM-64K

1

A0

2

A1

3

A2

4

VSS

5

SDA

6

SCL

7

WP

8

VCC

D363

2

1

3

4.7k

RA201

1

2

3

45

6

7

8

NC

C307

TCK

TDI
TDO

RST

PDN

RS

BATTP

BATTM

NC

C243

NC

C244

NC

C209

NC

C223

NC

C227

NC

C361

IC371

3.0V_REG

3

VOUT

1

VSS

2

VIN

TMS

2.2M

R379

X201

13.824MHZ

NC

R353

NC

R364

K1.0

C303

C353

K0.01

Q363

1

3

2

C304

NC

L331

L332

L334

390

R317

1.2

R370

1.5M

R376

1.5M

R378

D312

AK

D313

AK

D323

AK

D327

AK

D326

AK

D324

AK

D231

NC

AK

D353

1

2

D351

1

2

D352

1

2

D354

1

2

6.3V

3.3uF

C321

K0.1

C379

K0.1

C377

K6800P

C333

D10P

C202

D10P

C201

IC201

4

RSSI

5

XIN

6

XOUT

7

VDD

8

VCCIN

9

GND

10

GND

11

GND

12

GND

13

RST

14

FL_RST

15

FL_DO

16

FL_DI

17

FL_CS

18

BL_LED

19

SYN_OUT

20

TX_DATA

21

PA_CONT

22

SYN_LE2

29

VCC

30

SYN_LE1

31

SYN_CLK

32

SYN_DATA

33

RX_EN

34

TX_EN

35

RX_GAIN

36

RX_DATA

37

NC

38

CHG_DET

39

NC

40

NC

41

NC

42

NC

43

NC

44

DB4

45

DB5

46

DB6

47

DB7

54

NC

55

CI

56

LCD_RS

57

RW_WR

58

E_RD

59

LCDPOW

60

ANT_L1

61

ANT_L2

62

ANT_L3

63

STB_E

64

STB_D

65

STB_C

66

STB_B

67

STB_A

68

GND

69

VCC

70

TCK

71

TMS

72

TDI

79

FB

80

CHG_CLT

81

EE_SCL

82

EE_SDA

83

UART_TX

84

UART_RX

85

EE_WP

86

GND

87

PDN

88

IBAT1

89

VREF

90

MIP

91

MIM

92

MICBIAS

93

GND

94

VCCA

95

HSM

96

IBAT2

97

SPP

1

GND

2

SPPP

3

BCLK

23

CON_EN

24

RF_RESET

25

NC

26

SHCTRL

27

HEAD_DET

28

GND

48

GND

49

VCC

50

RESETB

51

FL_CLK

52

NC

53

NC

73

TDO

74

KIN_1

75

KIN_2

76

KIN_3

77

KIN_4

78

KIN_5

98

SPN

99

VCC

100

SPPN

22

R323

22

R324

K3300P

C316

C214

10uF

6.3V

C208

10uF

6.3V

RSSI

LCD_RS

RW_WR

E_RD

STB_D

STB_C

STB_B

STB_A

KIN_1

KIN_2

STB_E

KIN_5

KIN_4

KIN_3

SYN_OUT

TX_DATA

PA_CONT

SYN_LE2

CON_EN

RF_RESET

+
-

+
-

UART

CI

(7)

(8)

(2)

(11)

(13)

(14)

(12)

(8)

(9)

(10)

(4)

(5)
(6)

(3)

(1)

NC: No Components

KX-TGA561 SCHEMATIC DIAGRAM (Handset_Main)

SP-phone

20ms

3.0V 3.6~4.2V

TEST SIGNAL
FREQUENCY:1KHz

SP phone RX
(MIC Mute: ON) 
1.8Vp-p/8
(Vol.MAX)

Headset RX
170mVp-p/150
(Vol. MAX)

Headset TX
-37dBm/600   

 IN 

50mVp-p

Handset RX
(MIC Mute: ON) 
590mVp-p/150

 

(Vol. MAX)

Handset TX 
 -33dBm/600    IN
88mVp-p

SP phone TX
 -43dBm/600    IN
30mVp-p 

Power ON
(Reset)

93

KX-TG5621BXS / KX-TGA561BXS

Summary of Contents for KX-TG5621BXS

Page 1: ...td All rights reserved Unauthorized copying and distribution is a violation of law KX TG5621BXS KX TGA561BXS 5 8 GHz Digital Cordless Phone Silver Version for Asia Middle Near East and Other area Telephone Equipment ORDER NO KM40602978CE ...

Page 2: ...7 10 2 To Terminate Communication 47 10 3 Ringing 47 11 BLOCK DIAGRAM BASE UNIT_MAIN 48 12 CIRCUIT OPERATION BASE UNIT_MAIN 49 12 1 DSP Digital Speech Signal Processing IC501 49 12 2 EEPROM IC611 49 12 3 Power Supply Circuit 50 12 4 Reset Circuit 52 12 5 Telephone Line Interface 53 12 6 Parallel Connection Detect Circuit 54 12 7 Calling Line Identification Caller ID 55 13 BLOCK DIAGRAM BASE UNIT_R...

Page 3: ...RS AND DIODES 81 27 1 Base Unit 81 27 2 Handset 81 28 REPLACEMENT PARTS LIST 82 28 1 Base Unit 82 28 2 Handset 84 28 3 Accessories and Packing Materials 86 28 4 Fixtures and Tools 86 29 FOR SCHEMATIC DIAGRAM 87 29 1 Base Unit SCHEMATIC DIAGRAM BASE UNIT_MAIN 87 29 2 Handset SCHEMATIC DIAGRAM HANDSET_MAIN 87 30 SCHEMATIC DIAGRAM BASE UNIT_MAIN 88 31 SCHEMATIC DIAGRAM BASE UNIT_RF PART 90 32 SCHEMAT...

Page 4: ...temperature soldering irons Do not heat the PCB for too long time in order to prevent solder splash or damage to the PCB PbF solder will tend to splash if it is heated much higher than its melting point approximately 1100 F 600 C When applying PbF solder to double layered boards please check the component side for excess which may flow onto the opposite side See the figure below 1 1 Suggested PbF ...

Page 5: ...atic electricity When repairing the following precautions will help prevent recurring malfunctions 1 Cover plastic parts boxes with aluminum foil 2 Ground the soldering irons 3 Use a conductive mat on worktable 4 Do not grasp IC or LSI pins with bare fingers 3 CAUTION 1 Danger of explosion if battery is incorrectly replaced 2 Replace only with the same or equivalent type recommended by the manufac...

Page 6: ... service The battery strength may not be indicated correctly if the battery is disconnected and connected again even after it is fully charged In that case by recharging the battery as mentioned above you will get a correct indication of the battery strength 4 1 3 Battery Level 6 KX TG5621BXS KX TGA561BXS ...

Page 7: ...4 1 4 Panasonic Battery Performance 4 2 Location of Controls 4 2 1 Base Unit 7 KX TG5621BXS KX TGA561BXS ...

Page 8: ...4 2 2 Handset 4 3 Displays 4 3 1 Display Items 8 KX TG5621BXS KX TGA561BXS ...

Page 9: ...4 3 2 Troubleshooting Handset LCD 9 KX TG5621BXS KX TGA561BXS ...

Page 10: ...4 4 Settings 4 4 1 Connecting the AC adaptor and telephone line cord 10 KX TG5621BXS KX TGA561BXS ...

Page 11: ...features using the handset To access the features there are 2 methods scrolling through the display menus or using the direct commands Mainly the direct command method is used in this Service Manual 4 4 2 1 Programming by scrolling through the Display Menus 11 KX TG5621BXS KX TGA561BXS ...

Page 12: ...4 4 2 2 Programming using the Direct Commands 12 KX TG5621BXS KX TGA561BXS ...

Page 13: ...4 4 3 Dial Lock For Service Hint If the current password is forgotten enter 726276642 and you will be able to go to step 3 13 KX TG5621BXS KX TGA561BXS ...

Page 14: ...4 5 Troubleshooting 14 KX TG5621BXS KX TGA561BXS ...

Page 15: ...15 KX TG5621BXS KX TGA561BXS ...

Page 16: ...5 DISASSEMBLY INSTRUCTIONS 5 1 Base Unit Shown in Fig To Remove Remove 1 Cabinet Cover Screws 2 6 12 A 4 Main P C Board Solders Main P C Board 16 KX TG5621BXS KX TGA561BXS ...

Page 17: ...5 2 Handset Shown in Fig To Remove Remove 2 Cabinet Cover Screws 2 14 B 2 3 Follow the procedure 4 Main P C Board Tape and Solders Screws 2 9 C 3 Main P C Board 17 KX TG5621BXS KX TGA561BXS ...

Page 18: ...6 HOW TO REPLACE THE HANDSET LCD 18 KX TG5621BXS KX TGA561BXS ...

Page 19: ... Check Power P 20 Check Battery Charge P 21 Check Link P 22 Check the RF part P 23 Check Handset Transmission P 29 Check Handset Reception P 29 Check Caller ID P 29 7 TROUBLESHOOTING GUIDE 19 KX TG5621BXS KX TGA561BXS ...

Page 20: ... Reference Power Supply Circuit P 50 Reset Circuit P 52 Note DSP is IC501 1 Refer to SPECIFICATIONS on cover page for part number and supply voltage of AC adaptor 7 1 Check Power 20 KX TG5621BXS KX TGA561BXS ...

Page 21: ...Note DSP is IC501 7 2 Check Battery Charge 21 KX TG5621BXS KX TGA561BXS ...

Page 22: ...Note DSP is IC501 1 Refer to Finding out the Defective part P 23 Cross Reference Check the RF part P 23 7 3 Check Link 22 KX TG5621BXS KX TGA561BXS ...

Page 23: ...t the Defective part After All the Checkings or Repairing 1 Re register the checked Handset to the checked Base Unit and Regular HS to Regular BU Note 1 HS Handset 2 BU Base Unit 7 4 1 1 Re registering a Handset 23 KX TG5621BXS KX TGA561BXS ...

Page 24: ...7 4 2 RF Check Flowchart Each item 1 6 of RF Check Flowchart corresponds to Check Table for RF part P 25 Please refer to the each item 24 KX TG5621BXS KX TGA561BXS ...

Page 25: ...ar BU 2 Confirm that RSSI of the Regular BU is approximately 2V by Oscilloscope 6 5 RX Sensitivity confirmation Regular HS BU Mode Test Burst Mode 1 HS BU to be checked Mode RX CW Mode 4 1 Place the Regular HS about 15cm away from the BU 2 Confirm that RSSI of the BU is approximately 2V by Oscilloscope 5 1 Place the HS about 15cm away from the Regular BU 2 Confirm that RSSI of the HS is approximat...

Page 26: ...Register Regular HS to BU to be checked 2 Set BU to Test Link mode 3 Set Regular HS to Test Link mode Set TX Power and RX Sensitivity of the BU and Regular HS by CHART1 At distance of about 20m between HS and BU Link OK RX Sensitivity of the BU is OK No Link RX Sensitivity of the BU is NG 1 Register HS to be checked to Regular BU 2 Set Regular BU to Test Link mode 3 Set HS to Test Link mode Set TX...

Page 27: ...7 4 5 RF DSP Interface Signal Wave Form Test Burst Mode 27 KX TG5621BXS KX TGA561BXS ...

Page 28: ... Test Burst Mode 28 KX TG5621BXS KX TGA561BXS ...

Page 29: ...efer to Check the RF part P 23 7 7 Check Caller ID Cross Reference Telephone Line Interface P 53 Calling Line Identification Caller ID P 55 Note Make sure the format of the Caller ID service of the Telephone company that the customer subscribed to Also we recommend to confirm that the customer is really a subscriber of the service 29 KX TG5621BXS KX TGA561BXS ...

Page 30: ...the external Buttons because Base Unit has only LOCATOR key To short KIN3 to GND refer to a method of connection of TEST_SW in For Test Mode in Base Unit Reference Drawing P 39 Insert AC adaptor during checking 2 Refer to Check Table for RF part P 25 and RX CW Test Mode P 35 for proper Handset settings 30 KX TG5621BXS KX TGA561BXS ...

Page 31: ... Unit has only LOCATOR key To short KIN3 to GND refer to a method of connection of TEST_SW in For Test Mode in Base Unit Reference Drawing P 39 Insert AC adaptor during checking 2 Refer to Check Table for RF part P 25 and Test Burst Mode P 34 for proper Handset settings 31 KX TG5621BXS KX TGA561BXS ...

Page 32: ...nly LOCATOR key To short KIN3 to GND refer to a method of connection of TEST_SW in For Test Mode in Base Unit Reference Drawing P 39 Insert AC adaptor during checking 2 for factory use only 3 Refer to Check Table for RF part P 25 and Test Link Mode P 36 for proper Handset settings 32 KX TG5621BXS KX TGA561BXS ...

Page 33: ...8 Note 1 When you check test mode connect to the external Buttons because Base Unit has only LOCATOR key To short KIN3 to GND refer to a method of connection of TEST_SW in For Test Mode in Base Unit Reference Drawing P 39 Insert AC adaptor during checking 33 KX TG5621BXS KX TGA561BXS ...

Page 34: ...t for Handset 8 2 1 Test Burst Mode Note 1 LCD displays the Channel number exception default CH00 1ch 2 Refer to Check Table for RF part P 25 and RX CW TEST Mode P 31 for proper Base Unit settings 34 KX TG5621BXS KX TGA561BXS ...

Page 35: ... RX CW Test Mode Note 1 LCD displays the Channel number exception default CH00 1ch 2 Refer to Check Table for RF part P 25 and Test Burst Mode P 30 for proper Base Unit settings 35 KX TG5621BXS KX TGA561BXS ...

Page 36: ... Mode Note 1 LCD displays the Channel number exception default CH00 1ch 2 for factory use only 3 Refer to Check Table for RF part P 25 and Test Link Mode P 32 for proper Base Unit settings 36 KX TG5621BXS KX TGA561BXS ...

Page 37: ...ustment Mode Cross Reference 1 Adjust Battery Low Detector Voltage Handset P 38 Note 2 These are the default values 3 These values may not be fixed depending on the battery strength 37 KX TG5621BXS KX TGA561BXS ...

Page 38: ...key to Adjust Crystal mode Clock Adj is displayed on LCD Check BCK frequency 4 If the BCK frequency is out of the checking tolerance 100Hz adjust to Adjustment tolelance 30Hz by pressing or key Adjustment Tolerance 13 824MHz 30Hz 5 Press TALK key to write the new frequency factor in EEPROM 6 Turn the power off Then this value is available Cross Reference Adjustment Mode P 37 8 4 Adjust Battery Low...

Page 39: ...688 C504 C679 C677 RA500 RA501 C503 C663 C381 D380 C332 4 1 5 8 C331 C307 C304 R300 RST R422 R423 R421 R373 Q143 R371 R303 C308 R301 R364 R365 C303 R341 R340 R342 R304 R305 5 4 1 3 R372 R343 C342 C422 C423 25 1 51 75 26 50 76 100 C611 R460 R454 R453 MIP2 MIN2 R452 C453 R533 R459 R601 C601 R171 C172 R122 R121 R134 C121 C122 C120 C160 C162 C142 D142 C517 HSSPOUT R517 C174 C515 C341 C352 C173 R167 R1...

Page 40: ...54 C377 C303 C304 C307 C208 C317 C226 R226 C243 R317 R333 C333 C336 C305 R222 R228 R201 C202 C224 R224 R223 D223 C222 C221 C212 C214 C215 C201 C219 R227 R234 R247 R232 R246 C227 C246 C322 C321 C334 L334 C332 R331 R263 R262 R261 R323 R324 L332 L327 L326 D326 D327 L211 C262 C371 C272 C273 C386 R272 R273 C361 L331 D323 D324 C335 R231 C231 C225 R225 C204 C340 R340 C306 R208 R334 C244 C316 C315 C379 C3...

Page 41: ...76 5826 590680 13 5770 404840 45 5798 944684 77 5827 484527 14 5771 294732 46 5799 834576 78 5828 374420 15 5772 188580 47 5800 728424 79 5829 268268 16 5773 078473 48 5801 618316 80 5830 158160 17 5773 972320 49 5802 512164 81 5831 052008 18 5774 862213 50 5803 402057 82 5831 941900 19 5775 756060 51 5804 295904 83 5832 835748 20 5776 645953 52 5805 185797 84 5833 725641 21 5777 539801 53 5806 07...

Page 42: ...662 13 5770 402867 45 5798 942710 77 5827 482554 14 5771 296714 46 5799 836558 78 5828 376402 15 5772 186607 47 5800 726451 79 5829 266294 16 5773 080455 48 5801 620298 80 5830 160142 17 5773 970347 49 5802 510191 81 5831 050035 18 5774 864195 50 5803 404039 82 5831 943882 19 5775 754087 51 5804 293931 83 5832 833775 20 5776 647935 52 5805 187779 84 5833 727623 21 5777 537828 53 5806 077671 85 583...

Page 43: ... this operation Erase stored Phone numbers Caller list and etc This operation should not be performed for a usual repair Note 1 Be sure to short the battery terminals of the Handset with a lead wire etc for 2 seconds for discharge after removing the battery 43 KX TG5621BXS KX TGA561BXS ...

Page 44: ... the same frequency The construction of RX TX frequency data is shown below It consists of 4 slots from the Base Unit to the Handset and 4 slots from the Handset to the Base Unit total 8 slots in 10ms By this slot system simultaneous air link and communication between 4 Handsets and the Base Unit can be realized One communication between Handset and the Base Unit is done by one slot from the Base ...

Page 45: ...form four duplex communications simultaneously In 1 slot 1 25ms the 10ms of voice data is transmitted Each slot makes every frame frequency hop 100hops sec Although each slot UpLink3 and UpLink4 uses different frequency UpLink3 and DownLink3 use the same frequency 2 Handsets Link Traffic Bearer A link is established between Base Unit and Handset The state where duplex communication is performed Th...

Page 46: ...P performs TDD TDMA and ADPCM decoding to convert the RXDATA into the voice signal then it is output to the speaker Transmission The voice signal entering from the Handset microphone is led to DSP IC201 The DSP encodes ADPCM and TDD TDMA with FHSS to TXMOD The TXMOD signal is enter to IC701 of RF PART and modulated to 2 4GHz The 2 4GHz signal is up converted to 5 8GHz RF signal by IC801 The RF sig...

Page 47: ...10 EXPLANATION OF LINK DATA COMMUNICATION 10 1 Calling 10 2 To Terminate Communication 10 3 Ringing 47 KX TG5621BXS KX TGA561BXS ...

Page 48: ...501 DSP CHG 4 0V CONVERTOR INUSE DETECT 2 INUSE DETECT 1 RECEIVE AMP DCIN1 IC331 RESET POWER_DOWN VCCIN VCC VCCA VCCPA CHARGE CURRENT CHG_CTL INT_1 V_RF INT_1 5 VCC INUSE_LED OSC_IN IC611 EEPROM KEYS IC300 Q300 R151 R152 Q171 R371 R373 RSSI SHCTRL RADIO_EN TX_EN RX_EN LO_EN SYN_DATA SYN_CLK OSC_IN SYN_LE2 TXDATA V_RF VPA Q535 WP CLK CHG_LED KEY1 6 KEYA F RXDATA SYN_LE1 SYN_OUT RX_GAIN RF_RESET 3 3...

Page 49: ...ion is performed during Record Play back and Line Monitoring modes of operation When the DTMF data from the Handset is received the DTMF signal is output Caller ID demodulation The DSP implements monitor and demodulate the FSK signals that provide CID information from the Central Office Analog Switching The voice signal from telephone line is transmitted to the speaker or the voice signal from spe...

Page 50: ...pply Circuit Function The power supply voltage from AC adaptor is converted to the desired voltage of each block Circuit Operation Q300 and IC300 4 0V DCDC Converter IC331 3 3V Regulator 50 KX TG5621BXS KX TGA561BXS ...

Page 51: ...cuits Main charge 130 220mA at the Battery of maximum 7 hours is started soon after the Handset is placed on the Base Unit Then it changes to Trickle charge to prevent from overcharging Q361 and Q362 detect the ON HOOK state Handset is placed on Base Unit 51 KX TG5621BXS KX TGA561BXS ...

Page 52: ...t Operation When the AC Adaptor is inserted into the unit then the voltage is shifted by IC331 and power is supplied to the DSP The set starts to operate when VCC goes up to 3 0V or more in the circuit voltage diagram Note 1 The initializing time of the DSP chip is 28ms under normal conditions 52 KX TG5621BXS KX TGA561BXS ...

Page 53: ...SP detects a ring signal Q141 turns on thus providing an off hook condition active DC current flow through the circuit Following signal flow is the DC current flow T L101 D101 Q141 Q161 R163 D101 L102 P101 R ON HOOK Circuit Q141 is open Q141 is connected as to cut the DC loop current and to cut the voice signal The unit is consequently in an on hook condition Pulse Dial Circuit Pin 59 of DSP turns...

Page 54: ...r off hook by detecting changes in the T R voltage Circuit Operation Parallel connection detection when on hook When on hook the voltage is monitored at pin 86 of IC501 There is no parallel connection if the voltage is 1 65 V or higher while a parallel connection is deemed to exist if the voltage is lower Parallel connection detection when off hook When off hook the voltage is monitored at pin 90 ...

Page 55: ...The method is chosen according to the exchange of telephone office This unit is available to receive the data with both methods and displays the received data on LCD FSK Frequency Shift Keying format DTMF format It is the method to send the telephone number of calling party with DTMF to the telephone DTMF is sent before the first bell signal The data is sent in turn first the start code secondly t...

Page 56: ...od Circuit 2 4GHz 2 4GHz FL811 IC851 5 8GHz Power Amp 5 8GHz LNA V_PA V_RF RADIO_EN SYN_LE2 SYN_CLK SYN_DATA SYN_LE1 OSC_IN TX_EN SYN_OUT TX_DATA RX_DATA RSSI SHCTRL RF_RESET RX_EN RX_GAIN DSP PLL Serial Interface 5 8GHz Converter Circuit IC801 3 4GHz 5 8GHz PA_CONT VCC TXEN REFIN ANT0 RXEN RXGAIN and Antenna Switch Circuit 5 8GHz FL821 KX TG5621 BLOCK DIAGRAM Base Unit_RF Part FL881 KX TG5621BXS ...

Page 57: ...GHz 2 4GHz 5 8GHz Power Amp 5 8GHz LNA V_PA V_RF RADIO_EN CON_EN SYN_LE2 SYN_CLK SYN_DATA SYN_LE1 OSC_IN TX_EN SYN_OUT TX_DATA RX_DATA RSSI SHCTRL RF_RESET RX_EN RX_GAIN DSP PLL Serial Interface 5 8GHz Converter Circuit IC801 IC851 3 4GHz 5 8GHz PA_CONT VCC TXEN REFIN RXEN RXGAIN and Antenna Switch Circuit KX TGA561 BLOCK DIAGRAM Handset_RF Part ANT FL811 VCC 5 8GHz FL821 FL881 KX TG5621BXS KX TGA...

Page 58: ...iption RF part includes Transmitter and Receiver functions Digital signals Mainly voice data that come from DSP are modulated and are transmitted On the other hand received signals are demodulated and go out to DSP 58 KX TG5621BXS KX TGA561BXS ...

Page 59: ...se Unit or 3 3V at Handset is supplied to the Power amplifier in 5 8GHz PA circuit IC841 is 3 0V Regulators and IC761 is a 2 5V Regulator They output Vcc_5 8GHz and Vcc_2 4GHz respectively by order of RADIO_EN signal or CON_EN signal V_RF is approximately 4 0V Base Unit or 3 6V Handset 59 KX TG5621BXS KX TGA561BXS ...

Page 60: ...cuit and supplied to pin4 of IC701 then demodulated signal RX_DATA comes out from pin 16 At the same time RSSI Received Signal Strength Indicator outputs from the pin 14 Reference clock 13 824MHz from DSP block is supplied to pin 11 of IC701 VCC_2 4G supplies 2 5V regulated voltage Note The exposed GND PLATE on the bottom of the IC701 supplies the circuit ground s for the entire chip It is very im...

Page 61: ...e and up converts into 5 8GHz TX signal This 5 8GHz TX signal is output from pin 2 and goes into the 5 8GHz PA circuit 5 8GHz RX signal from 5 8GHz LNA circuit supplied to pin 5 of IC801 and internal RX MIXER multiplies it by 3 4GHz Local signal from internal VCO module and down converts into 2 4GHz RX signal This 2 4GHz RX signal is output from pin 15 and goes into the 2 4GHz Mod Demod circuits N...

Page 62: ...bottom of the IC851 supplies the circuit ground s for the entire chip It is very important that a good solder connection is made between this GND PLATE and the ground plane of the PCB underlying the IC851 Base Unit IC851 includes Switches for High frequency signals and controlled by ANT0 signal and ANT 1 signal from DSP DSP is checking RSSI Received Signal Strength Indicator signal and selects bet...

Page 63: ...N CON_EN SYN_LE2 SYN_OUT SYN_DATA SYN_CLK SYN_LE1 RX_GAIN RX_EN TX_EN SHCTRL RF_RESET RSSI WP CLK DATA LCD_LIGHT KEY_LIGHT KEYSTOROBE_A F KEYIN_1 5 Q231 CHARGE DETECT CHARGE Q361 Q221 Q362 Q363 CHARGE CONTROL RESET POWER DOWN REGULATOR MIC SP Headset Jack CN331 Q331 LED261 HEADSET DETECT Monitor SP 3 3V REGULATOR LCD KEYS RF part ANT X201 13 824MHz EEPROM BATTERY PA_CONT TX_DATA RX_DATA OSC_IN Q26...

Page 64: ...ircuit Ringer Generation Interface circuit RF part Speaker Mic LED Key scan LCD Headset Initial waves Note 1 The initializing time of the DSP chip is 20ms under normal conditions 17 1 2 RF part Mainly voice signal is modulated to RF or it goes the other way 17 1 3 EEPROM IC241 All setting data is stored ex ID code user setting Phonebook Caller ID data 64 KX TG5621BXS KX TGA561BXS ...

Page 65: ...tely to each block BATTERY 3 6V KEY BACK LIGHT RF part REG 3 3V IC381 DSP LCD IC201 EEPROM IC241 MIC CIRCUIT 3 6V 3 0VD V RF V PA REG 3 0V IC371 Block Diagram Handset Power LEDS 3 0VA BATT BATT R318 CHARGE2 Q361 CHARGE1 D353 65 KX TG5621BXS KX TGA561BXS ...

Page 66: ...een CHARGE and CHARGE flows R231 Q231 pin38 of IC201 where the charge is detected Then IC201 calculates the battery consumption amount from the previous charge and it controls Q361 Q362 Q363 by pin80 of IC201 until charging is complete When charging is complete the control pattern is switched to Trickle charging form from Operational charging form 17 4 Ringer and Handset SP Phone 66 KX TG5621BXS K...

Page 67: ...e power for the microphone is supplied from DSP 92 and the power is turned OFF on standby 17 6 Reception Signal The voice signal from the Base Unit is output to DSP 98 This signal is led to the headset jack CN331 The signal through the headset jack and the other signal output from DSP 97 drives the speaker When the headset is inserted to the jack the voice signal is cut at the jack so the sound do...

Page 68: ...18 SIGNAL ROUTE Each signal route is as follows RF part signal route 68 KX TG5621BXS KX TGA561BXS ...

Page 69: ...WP Write 45 NC D O 46 GND GND GND 47 VCC VCC VCC 48 NC INT0 D O 49 NC D O 50 NC D O 51 NC D O 52 NC D O 53 KEY_STB_C D O Active Not 54 KEY_STB_B D O Active Not 55 KEY_STB_A D O Active Not 56 LINE_SZ D O On Off 57 NOT_RLY D O On Hook Off Hook 58 BELL D I OFF ON 59 RLY D O Off Hook On Hook 60 NC D O 61 NC D O 62 NC D O PIN Description I O High High_Z Low 63 KEY_IN3 D I Non Key In 64 KEY_IN2 D I Non ...

Page 70: ...CC 50 DOT_LCD_ RESET D O Normal Reset 51 FLASH_SCK D O High Low 52 NC INT0 D O Normal 53 NC D O Normal 54 NC D O Normal 55 NC D O Normal 56 DOT_LCD_RS D O Data Instruct 57 DOT_LCD_ RW_WR D O Read Write 58 DOT_LCD_ E_RD D O Active Not PIN Description I O High High_Z Low 59 DOT_LCD_ POWER_SW D O On Off 60 ANT_LED1 D O Off On 61 ANT_LED2 D O Off On 62 ANT_LED3 D O Off On 63 KEYSTROBE _E D O Not Activ...

Page 71: ...21 EXPLANATION OF IC TERMINALS RF PART 21 1 IC701 71 KX TG5621BXS KX TGA561BXS ...

Page 72: ...21 2 IC801 Backside Terminal GND 72 KX TG5621BXS KX TGA561BXS ...

Page 73: ...21 3 IC851 Backside Terminal GND 73 KX TG5621BXS KX TGA561BXS ...

Page 74: ...Flux Specific Gravity 0 82 Type RMA lower residue non cleaning type Note See ABOUT LEAD FREE SOLDER PbF Pb free P 4 22 2 How to Remove the IC 1 Put plenty of solder on the IC pins so that the pins can be completely covered Note If the IC pins are not soldered enough you may give pressure to the P C board when cutting the pins with a cutter 2 Make a few cuts into the joint between the IC and its pi...

Page 75: ...esponding soldering foil 2 Apply flux to all pins of the FLAT PACKAGE IC 3 Solder the pins sliding the soldering iron in the direction of the arrow 22 4 How to Remove a Solder Bridge 1 Lightly resolder the bridged portion 2 Remove the remaining solder along the pins using a soldering iron as shown in the figure below 75 KX TG5621BXS KX TGA561BXS ...

Page 76: ...ized nozzle of the hot air desoldering tool that matches the IC package Be careful about the temperature of the hot air desoldering tool not to damage the PCB and or IC 23 3 How to Remove the IC 1 Heat the IC with a hot air desoldering tool through the P C Board 2 Pick up the IC with tweezers etc when the solder is melted completely Note Be careful not to touch the peripheral parts with tweezers e...

Page 77: ...done very carefully 3 Heat the IC with a hot air desoldering tool through the P C Board until the solder on IC bottom is melted Note Be sure to place it precisely controlling the air volume of the hot air desoldering tool 4 After soldering confirm there are no short and open circuits with visual inspection 23 5 How to Remove a Solder Bridge When a Solder Bridge is found after soldering the bottom ...

Page 78: ...24 CABINET AND ELECTRICAL PARTS BASE UNIT 78 KX TG5621BXS KX TGA561BXS ...

Page 79: ... 1 This cable is fixed by welding Refer to HOW TO REPLACE THE HANDSET LCD P 18 2 Stick the magnetic shield No 119 to the exact location discribed above 3 Attach the spacer No 125 to the exact location described above 79 KX TG5621BXS KX TGA561BXS ...

Page 80: ...26 ACCESSORIES AND PACKING MATERIALS 80 KX TG5621BXS KX TGA561BXS ...

Page 81: ...27 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 27 1 Base Unit 27 2 Handset 81 KX TG5621BXS KX TGA561BXS ...

Page 82: ... CUSHION 11 PQKF10660Y1 CABINET COVER PS HB 12 PQGT18847Z NAME PLATE 28 1 2 Main P C Board Parts Note 1 When you have replaced IC501 or IC611 adjust X501 Refer to Check and Adjust X501 Base Unit Frequency P 38 2 When replacing IC701 IC801 or IC851 refer to HOW TO REPLACE THE LLP Leadless Leadframe Package IC P 76 Ref No Part No Part Name Description Remarks PCB1 PQWPG5621BXH MAIN P C BOARD ASS Y R...

Page 83: ...2X 5 6K R834 ERJ2GEJ332 3 3K Ref No Part No Part Name Description Remarks R865 ERJ2GEJ271 270 CAPACITORS C101 F1K2J681A006 680P S C102 F1K2J681A006 680P S C111 F1J2A473A024 0 047 C112 F1J2A473A024 0 047 C113 PQCUV1A684KB 0 68 S C120 ECUV1H102KBV 0 001 C121 ECUV1H681JCV 680P S C122 ECUV1H681JCV 680P S C132 ECUV1H103KBV 0 01 C142 ECUV1H103KBV 0 01 C152 ECUV1H103KBV 0 01 C161 EEE1EA100WR 10 C162 ECUV...

Page 84: ...4 PQJT10226Z CHARGE TERMINAL R 115 PQHR10778Z GUIDE SP HOLDER ABS HB Ref No Part No Part Name Description Remarks 116 PQHG10703Z RUBBER PARTS SPEAKER 117 L0AD02A00026 SPEAKER 118 PQKE10395Z1 COVER EARPHONE 119 PQMC10496Z MAGNETIC SHIELD ANTENNA 120 PQKE10394Z2 COVER LED CAP PC ABS HB 121 PQHR11081Y GUIDE LED CAP ABS HB 122 PQHR11080Z OPTIC CONDUCTIVE PARTS LED LENS PMMA HB 123 PQKF10715Z1 CABINET ...

Page 85: ...E0R00 0 R822 ERJ2GEJ271 270 R823 ERJ2GEJ180 18 R824 ERJ2GEJ271 270 Ref No Part No Part Name Description Remarks R832 ERJ2GEJ562X 5 6K R834 ERJ2GEJ332 3 3K R864 ERJ2GEJ102 1K R865 ERJ2GEJ391 390 CAPACITORS C201 ECJ0EC1H100D 10P C202 ECJ0EC1H100D 10P C204 ECJ0EB1A104K 0 1 C206 ECJ0EB1A104K 0 1 C208 F1J0J1060007 10 C211 EEE0GA331WP 330 C212 ECJ0EB1C103K 0 01 C214 F1J0J1060007 10 C215 ECJ0EB1A104K 0 1...

Page 86: ...LAY 3 E102 PQHX11289Z COVER LCD COVER SHEET E103 PQHR11065Z TRANSPARENT PLATE LCD PLATE PMMA HB E104 PQHR11228Z GUIDE LCD ABS HB E105 PQMC10492Z MAGNETIC SHIELD FRAME E106 PQMC10491Z MAGNETIC SHIELD COVER CN331 K2HD103D0001 JACK X201 H0J138500003 CRYSTAL OSCILLATOR 28 3 Accessories and Packing Materials Note 1 You can download and refer to the Operating Instructions Instruction book on TSN Server ...

Page 87: ...ge line 2 This schematic diagrams may be modified at any time with the development of new technology 29 2 Handset SCHEMATIC DIAGRAM HANDSET_MAIN Notes 1 DC voltage measurements are taken with an oscilloscope or a tester with a ground 2 The schematic diagrams may be modified at any time with the development of new technology 87 KX TG5621BXS KX TGA561BXS ...

Page 88: ...3 C120 1000p NC IC601 1 RDY BUSY 2 RESET 3 WP 4 NC1 5 NC2 6 VCC 7 GND 8 NC3 9 NC4 10 NC5 11 CS 12 SCK 13 SI 14 SO 15 NC6 16 NC7 17 NC8 18 NC9 19 NC10 20 NC11 21 NC12 22 NC13 23 NC14 24 NC15 25 NC16 26 NC17 27 NC18 28 NC19 NC R675 IC611 1 NC1 2 NC2 3 NC3 4 VSS 5 SDA 6 SCL 7 WC 8 VCC K0 1 C611 1k R611 J100P C612 10k R612 R684 R687 100n C531 C8p C508 C8p C509 CN661 3 KEYS_B CN661 2 KEYS_A CN661 25 SE...

Page 89: ...CM DCM2 L1T L1R C111 0 047 C112 0 047 16V 10u C166 2SA1971 TE12L F Q141 1 2 3 33u L101 33u L102 K0 68 C113 Q156 NC 1 2 3 Q362 1 3 2 47k R362 NC R363 Q142 1 2 3 Q143 NC 1 2 3 C165 K0 047 C163 K4700P 50V C162 J100P C167 K0 22 C308 K0 1 K680P 50V C122 K680P 50V C121 K0 047 C184 C185 K0 018 NC C171 NC C174 NC C175 NC C177 NC C173 NC C183 NC C182 D101 4 3 1 2 22u 6 3V C176 CN301 2 1 1M R133 10M R151 3 ...

Page 90: ...10P C824 J100P C833 FL821 5 8GHz_BPF 1 2 3 4 C5P C881 C836 K1uF 1608 5 6k R832 3 3k R834 L821 NC NC R862 NC R812 NC R814 270 R822 270 R824 18 R823 C5P C891 NC R873 IC851 5 8G_PA 4 GND_ISO3 5 ANT2 6 GND_ISO4 7 VDD_LNA1 8 GND_LNA1 9 VDD_LNA2 10 GND_LNA2 11 NC 12 LNA_OUT 13 LNA_GAIN 14 LNA_EN 15 ANTSEL_B 16 ANTSEL_A 17 PA_EN 18 PA_IN 19 VDD_PA 20 GND_ISO5 21 PA_OUT 22 GND_ISO6 23 GND_ISO7 24 TRSW_IN ...

Page 91: ...SYN_LE2 SYN_DATA SYN_LE1 SYN_CLK TX_DATA RX_EN TX_EN RX_DATA SYN_OUT SHCTRL RF_RESET OSC_IN RX_GAIN GND NC C769 NC C768 NC C765 NC C766 NC C846 NC C736 NC C845 J100P C837 K1uF 1608 C842 L711 18nH L724 NC L860 NC C723 2 7nH C701 4 7uF 2125 C843 K0 47 1608 C763 K0 47 1608 C762 NC 1608 ANT0 ANT1 SHIELD NC C742 L768 NC IC701 2 4G_RF 1 TX 2 GND_ISO1 9 VCC_IF 3 GND_ISO2 4 RX 5 VCC_RF 6 VCC_IF2 7 TESTP 8...

Page 92: ...D257 1 2 LED256 1 2 Amber LED255 1 2 TXO RXE TXE RXI TE BCK NC C219 NC RA251 1 2 3 4 5 6 7 8 R A YG LED261 Y Green_Amber_Red 1 2 3 4 0 1uF CA274 1 2 3 4 5 6 7 8 Q261 1 2 3 4 5 Q255 1 2 3 4 5 0 LEFT UP SP TALK 1 2 3 4 5 6 7 8 9 SYA DOWN NEXT BACK MENU RIGHT FLASH HOLD PAUSE OFF 0 47uF CA271 1 2 3 4 C273 K0 1 C272 K0 47 3L_DOT_LCD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 120 RA255 1 ...

Page 93: ...52 1 2 D354 1 2 6 3V 3 3uF C321 K0 1 C379 K0 1 C377 K6800P C333 D10P C202 D10P C201 IC201 4 RSSI 5 XIN 6 XOUT 7 VDD 8 VCCIN 9 GND 10 GND 11 GND 12 GND 13 RST 14 FL_RST 15 FL_DO 16 FL_DI 17 FL_CS 18 BL_LED 19 SYN_OUT 20 TX_DATA 21 PA_CONT 22 SYN_LE2 29 VCC 30 SYN_LE1 31 SYN_CLK 32 SYN_DATA 33 RX_EN 34 TX_EN 35 RX_GAIN 36 RX_DATA 37 NC 38 CHG_DET 39 NC 40 NC 41 NC 42 NC 43 NC 44 DB4 45 DB5 46 DB6 47...

Page 94: ... 12 VARGND 13 PLL_BYP 14 VCC_PLL 15 2G4_OUT 16 GND_ISOL3 17 2G4_IN 18 VCC_TXRX 19 SYN_CLK 20 SYN_EN 21 SYN_DATA 22 RXEN 23 TXEN 24 VCC_PA1 1 VCC_PA2 2 TX 3 GND_ISOL1 IC851 5 8G_PA 4 GND_ISO3 5 ANT2 6 GND_ISO4 7 VDD_LNA1 8 GND_LNA1 9 VDD_LNA2 10 GND_LNA2 11 NC 12 LNA_OUT 13 LNA_GAIN 14 LNA_EN 15 ANTSEL_B 16 ANTSEL_A 17 PA_EN 18 PA_IN 19 VDD_PA 20 GND_ISO5 21 PA_OUT 22 GND_ISO6 23 GND_ISO7 24 TRSW_I...

Page 95: ...E2 SYN_DATA SYN_LE1 SYN_CLK TX_DATA RX_EN TX_EN RX_DATA SYN_OUT SHCTRL RF_RESET OSC_IN RX_GAIN GND NC C769 NC C768 NC C765 NC C766 NC C846 NC C736 NC C845 J100P C837 NC C742 K1uF 1608 C842 L711 18nH L724 NC L860 NC C723 2 7nH C701 4 7uF 2125 C843 K0 47 1608 C763 K0 47 1608 C762 NC 1608 L768 NC C0 5P C859 C0 5P C858 IC701 2 4G_RF 1 TX 2 GND_ISO1 9 VCC_IF 3 GND_ISO2 4 RX 5 VCC_RF 6 VCC_IF2 7 TESTP 8...

Page 96: ...Memo 96 KX TG5621BXS KX TGA561BXS ...

Page 97: ...685 R684 R612 8 5 1 4 R611 C612 R594 C681 C686 C687 C685 C684 C689 C688 C504 C679 C677 RA500 RA501 C503 C663 C381 D380 C332 4 1 5 8 C331 C307 C304 R300 RST R422 R423 R421 R373 Q143 R371 R303 C308 R301 R364 R365 C303 R341 R340 R342 R304 R305 5 4 1 3 R372 R343 C342 C422 C423 25 1 51 75 26 50 76 100 C611 R460 R454 R453 MIP2 MIN2 R452 C453 R533 R459 R601 C601 R171 C172 R122 R121 R134 C121 C122 C120 C1...

Page 98: ...ARGER 5661 71 72 5636 51 52 5631 32 33 34 5621 22 23 CHARGER DCM2 DCM DCP DCP2 L1R L1T 1 1 2 2 3 4 KIN3 MIC MIC MIP MIN JC JG URX2 UTX2 RED 2APVCC KI1 KSC CHG KSD INUSE KI2 JS R Y G B JI JO KX TG5621 CIRCUIT BOARD Base Unit_Main Flow Solder Side View KX TG5621BXS KX TGA561BXS 98 ...

Page 99: ...62 C766 C761 C841 C846 C842 C844 C843 C845 C874 C873 C811 C801 R824 R813 R812 R814 R873 R823 R822 R833 R701 R751 R752 R724 R747 R735 R864 R809 R742 R744 R861 R865 R863 R862 R832 R834 C824 C851 C852 C853 C863 C864 C821 L821 L871 L711 L768 L860 L724 L782 C802 C807 C865 C861 C862 C806 C713 C809 C707 C711 C837 C712 C715 C773 C742 R732 R733 C736 C737 C746 C745 SHIELD FL891 IC701 IC801 1 1 1 IC851 IC841...

Page 100: ...Memo KX TG5621BXS KX TGA561BXS 100 ...

Page 101: ... R354 C241 C209 C242 R241 R205 R207 R206 C206 R209 R242 R353 C354 C377 C303 C304 C307 C208 C317 C226 R226 C243 R317 R333 C333 C336 C305 R222 R228 R201 C202 C224 R224 R223 D223 C222 C221 C212 C214 C215 C201 C219 R227 R234 R247 R232 R246 C227 C246 C322 C321 C334 L334 C332 R331 R263 R262 R261 R323 R324 L332 L327 L326 D326 D327 L211 C262 C371 C272 C273 C386 R272 R273 C361 L331 D323 D324 C335 R231 C231...

Page 102: ...56 LED255 PbF TGA56 R KX TGA56 R LCD LEFT OFF A UP TALK MENU BACK NEXT DOWN PAUSE SP 1 2 3 4 5 6 7 8 9 0 MIC MIC MIC HOLD FLASH RIGHT LED252 LED254 LED251 LED253 KX TGA561 CIRCUIT BOARD Handset_Main Flow Solder Side View KX TG5621BXS KX TGA561BXS 102 ...

Page 103: ...6 C722 C723 C717 C716 C804 C714 C708 C762 C766 C761 C841 C846 C842 C844 C843 C845 C874 C873 C811 C801 R824 R813 R812 R814 R873 R823 R822 R833 R701 R751 R752 R724 R747 R735 R864 R809 R742 R744 R861 R865 R863 R862 R832 R834 C824 C851 C852 C853 C863 C864 C821 L821 L871 L711 L768 L860 L724 L782 C802 C807 C865 C861 C862 C806 C713 C809 C707 C711 C837 C712 C715 C773 C742 R732 R733 C736 C737 C746 C745 KX ...

Page 104: ...104 KX TG5621BXS KX TGA561BXS I N N KXTG5621BXS KXTGA561BXS ...

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